OPTIMUM
M A S C H I N E N - G E R M A N Y
Version 3.1.8 dated 2015-1-27
Page 25
Original operating instructions
BF20V
US
Main switch
Switches the voltage supply on.
The main switch is at the back of the control panel.
Hand-actuated auxiliary switch Start / Stop
Switches the machine on or off.
Turning direction
For selection of right-handed rotation, left-handed rotation or off position. Select the turning
direction before switching on the machine with the push button.
Speed
Potentiometer for setting the required speed. The speed and thus the cutting speed of the
material of the workpiece, of the cutter diameter and of the type of cutter.
The electronics controls the speed slowly to the target value with a ramp. Therefore, wait a
while before you continue milling or drilling with the feed.
Reduction stage
Rotary-type switch to select the reduction stage.
ATTENTION!
Wait until the mill drill has come to a complete halt, before performing any changes on
the gear switch.
Turn the gear switch to the position "H" for a speed range
from
approx.
150 - 3,000 RPM rpm.
Turn the gear switch to the position "L" for a speed range
from
approx.
90 - 1,500 RPM rpm.
4.3
Switching on the mill drill
Switch on the main switch.
Select the gear level.
Choose rotational direction.
Set the potentiometer to the lowest speed.
Close spindle protection system.
Actuate push button "Start".
Set the required speed on the potentiometer.
4.4
Switching off the mill drill
Press the hand-actuated auxiliary switch Stop. During long-term standstill switch the turn-
ing direction switch to the zero position.
